[rollei_list] Re: Rolleiflex clones Koni Omega lenses
- From: Eric Goldstein <egoldste@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Sun, 4 Oct 2009 10:35:37 -0400
Larry -
The 58 and the 135 are the two lens gems on these cameras... highly
corrected performance second to none on a 67 negative.
Eric Goldstein
--
On Sun, Oct 4, 2009 at 10:23 AM, Laurence Cuffe <cuffe@xxxxxxx> wrote:
>
> On Sunday, 04 October, 2009, at 09:35AM, "Eric Goldstein"
> <egoldste@xxxxxxxxx> wrote:
>>Oops... that should read the 135 mm lens option.
>>
>>On Sun, Oct 4, 2009 at 9:33 AM, Eric Goldstein <egoldste@xxxxxxxxx> wrote:
>>> Larry -
>>>
>>> Unfortunately, that piece is both incomplete and inaccurate. It fails
>>> to list the 180 mm lens option and has incorrect information about the
>>> 90 mm lens.
>>>
>>>
>>> Eric Goldstein
>
> Interesting. I only have the 58mm myself on a one hundred rapid omega. The
> following excerpt from the omega mailing list archives seems to explain where
> the dud info came from. Apparently there were deferent versions of the manual
> released some of which may have had incorrect information.
> All the best Larry Cuffe
>
> Excerpt starts here:
>>Something interesting has come to my attention. I have a copy of the
>>manual
>>for my Rapid M. James Watne has posted the manual for a Rapid 100 or 200.
>>There are some differences between the lenses listed in each.
>
>>The M manual doesn't list the 135 mm at all. This makes sense in light
>>of the fact that there are no dots in my viewfinder for the 135 mm lens,
>>and the manual makes repeated references to the 3 lenses available.
>
>>But the interesting thing is that the M manual lists the 60mm Hexanon
>>as having a 6 element 4 group lens, while the 100/200 manual lists the
>>58mm Omegon as having an 8 element 4 group lens. The diagrams of the
>>two lenses bear this out; the Hexanon is symmetrical, or nearly so,
>>while the Omegon has visible differences between the rear group and
>>the front group. They also list the angle of view as changing from
>>60 degrees 20 minutes to 61 degrees even.
>
>>It appears that the 100/200 manual has a typo in that the 90mm lens
>>is listed as having 6 elements 3 groups, despite the drawing only
>>showing 4 elements in 3 groups. Either they miswrote the description,
>>or they used the older diagram with the newer lens.
>
>>What does this all mean? Not much. 2/3 of one degree is a tiny
>>difference in field of view (it's probably smaller than the width
>>of the finder lines.) The shapes of the different groups in the 58
>>and 60 are pretty similar. I suspect that Mamiya split up the lens
>>differently to use different glass and/or different correction
>>formulae. Is it worth selling your 60 and getting a 58, or vice-versa?
>>Almost certainly not. But it is worth noting that there are some
>>differences between these two lenses, if only for academic purposes.
>
> Regards,
>
> Martin F. Melhus | PDGA# | Where would we be without
> melhus*at*fdrc.iit.edu | 11296 | hypothetical questions?
>
>
>>>
>>> --
>>>
>>> On Sun, Oct 4, 2009 at 9:00 AM, CarlosMFreaza <cmfreaza@xxxxxxxxx> wrote:
>>>> 2009/10/4 Laurence Cuffe <cuffe@xxxxxxx>:
>>>> ...> Carlos, the Koni Omeg'as are a fun line of cameras and I've got some
>>>>> excelent results with the 58mm lens. Karen Morekuma has a nice review at
>>>>> :http://www.photoethnography.com/ClassicCameras/index-frameset.html?KoniOmegaRapidM.html~mainFrame
>>>>> All the best
>>>>> Larry Cuffe
>>>>
>>>> Thank you very much Larry, interesting review, she liked the camera
>>>> but sold it finally.
>>>> My interest is about a MF camera provided with a powerful, well
>>>> corrected, wide angle lens for architectural shots, I don't want a MF
>>>> camera with normal lens -I already have the Rolleis TLR- and I don't
>>>> want to buy a wide angle lens as second lens, I want the combo
>>>> body-wide angle lens directly, most cameras are offered with the
>>>> normal lens and I don't want to buy the body only if I'm not sure
>>>> about to obtain the WA lens afterward, BTW I'm not in a hurry and my
>>>> budget is very limited, the Koni Omega RF I'm following looks very
>>>> good but it has the normal lens an it still is expensive, I'll see if
>>>> the price diminishes...
>>>>
>>>> Carlos
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>>>
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